Sample taking machine



193$, F. L. HOWARD I SAIPLE TAKING CHINE Filed June 21, 1955 sSheets-Shut 1 J fl m mm m fi Z k m y Hm. l N IHHnl n 5 x r m M 1... 2-unfit: hi -l- -h v m II &.m/ x m a w m M W a June 22, 1937. F. L'HOWARDSAIPLE TAKING CHINE Filed June 21, 19:5

3 Sheets-Sheet 2 Ii/IIlI/ll/ 4, 1 11/ 1/41/64 ./I///////// 4/ 1/1115l/llll/l t June 2?, 1937. F. L Hoybmb 2,984,585

Filud June 21. 1955 s meta-Sheet a effective machine for obtainingsamples of ce- Patented June. 22,1937

UNITED STATES PA ENT OFFICE FranR -BM 19 Claims. 3:1 :53? 3 50': v

This invention relates to a machine for taking samples and relates moreparticularly to a drilling machine for obtaining cores or samples ofconcrete, masonry units, stone work, etc., for the purpose of testingand determining the character of the same. A general object of thisinvention is to provide a readily portable and a practical mentitiousstructures, partitions, roads, etc. Another object of the, invention isto provide a compact sell-contained portable machine ior Fig. 3 is anenlarged fragmentary horizontal dedrilling or obtaining samples ofroads, walls, partitions, etc., of cementitious material and the Anotherobject or the invention is to provide a sample taking machine of thecharacter mentioned that is operable to obtain samples that Anotherobject of the invention is to provide a machine of the charactermentioned that is mobile,"being supported on wheels so that it may bereadily drawn or towed from place to place by an automobile or truck.

Another object of the invention is to'provide a, drilling machine orsample taking machine of the character mentioned that is operable todrill into a street, roador other substantially horizontal structurewhile carried by the wheeled vehicle-or trailer, and that may be removedfrom the traileriorthe purpose of obtaining a core or sample of avertical, inclined or overhead wall or the like.

Another object of the invention is to provide a machine or the charactermentioned in which the mechanism or unit that is removable from thetrailer includes the power unit, the drill driving mechanism, the drillfeeding mechanism and all other parts necessary to the drilling orsample taking operation. I

A further object of the invention is to provide a sample taking machineof the character mentioned that may be veryquickly set up or arrangedfor operation and that is easy and simple to operate and control.

The various objects and ieatures or the invention will be fullyunderstood from the following vertical detailed sectional view showingthe drill penetrating the cementitious structure or work andillustrating certain of the parts in elevation.

tailed sectional view taken substantially as indicated by line 3-4 onFig. 2. Fig. 4 is an enlarged fragmentary vertical detailed sectionalview of the. driving head and adjacent parts. Fig. 5 is a horizontaldetailed sectional view taken substantially as indicated by line 5-5 onFig. 4 showing the driving-head and pump in elevation, and Fig. 6 is aside elevation of the removable drilling mechanism arranged to take asample or a vertical wall showing the drill penetrating the wall.

. The machine provided by the present invention includes, generally, avehicle or trailer II, a support or guide column I I removably carriedby the trailer ll, a drilling or driving head l2 movable on the column Hand operable'to transmit rotation to a drill I3, 9. power unit I! fordriving or rotating the'drill it through the medium or the head I! andmovable on the column H together with the head I2, means I! foradvancing or feeding the drill l3 into the work W, means It The membersII are supported on and connected with an axle ll. Suitable wheels l8are provided. on the opposite projecting ends of the axle It. A shaft 2.or other suitable means is provided at the forward end or the trailerIII for facilitating its connection with an automotive vehicle. Ahousing or body 2| is provided on the trailer for enclosing the drillingmechanism. The back and top or a portion of the top of the body I 0 arepreferably open. The invention includes jacks trailer and suitable heads24 are provided on' their lower ends for engaging the road or work -W.Openings 25 are provided in the heads 24 v for receiving a rod or wrenchfor adjusting the screws 23. There may be two jacks of the characterdescribed provided on each frame member I! at longitudinally spacedpoints to effectively stabilize the trailer and hold it in place whenthe mechanism is in operation. The trailer body 2| may have acompartment 26 for carrying tools, etc. A door 21 isprovided fornormally closing the compartment 26. I

The column ll serves to support and guide the head l2 and the power unitM for movement whereby they may be shifted by the feed 'meansjl5 toadvance and retract the drill l3.

. .It is a feature of the invention that the column ,H' is removablyordetachably secured to the .trailer' l6 so that the active or operativedrilling mechanism may be removed from the trailer when it is desired toobtain a sample of an upright or overhead structure. The column I! ispreferably in the nature of a tube or pipe and is arranged vertically orat right angles to the frame members I l. The supporting and guidingcolumn II is preferably spaced between the 'frame members I! and ispreferably spaced rearwardly' from the akle l8. A bracket 28" extendsbetween and is attached to the frame members I! and has an opening 29receiving or passing the column II. The bracket 28 is sectional having acap or section 28 that is removableto allow the column I l to be removedfrom the bracket and vehicle It. One or more hand screws 30 may bethreaded through open-,

ings in the bracket 28 to engage the column II to hold or retain thecolumn in the desired or adjusted position. The column H is sufficientlylong to project upwardly through the body 2| and to project downwardlybeyond the frame members I1 to have its lower end at or adjacent thework W.

Means is provided for supporting the lower end of the column II on theroad or work W andfor steadying the column. A base .plate 3| is adaptedto be arranged on the upper surface of the road or work W and has acollar 32 which receives the lower end portion of the column H. A bolt33 passes through transverse openings in the column and collar 32 toremovably attach the plate 3| to the column. Where the machine is to beused as illustrated in Figs. 1 and 2 of the drawings screws 34 maybethreaded through openings 35 in corner portions of the plate 3| toengage the upper surface of the road or work W to position the plate andsteady the plate and column II. In addition to supporting and steadyingthe lower end of the column I! the plate 3i carries means for guidingand steadyifig the drill l3 as will be hereinafter described.

The drilling head or driving head 52 is provided to carry the drill l3and its operating stem and to transmit rotation thereto. The head [2 issupported by and movable on the column I l. The means for supporting ormounting the head I2 on the column ll includes a sleeve 36 surroundingand shiftable on the column. The sleeve 36 carries the head l2 and thecolumn I].

' about the shaft 55.

2,084,686 for stabilizing the trailer l0 and for holding power unit l4and is keyed to the column H so that it cannot turn. In the preferredstructure illustrated a rib or key 31 is attached to the column II and agroove 38 in the sleeve 36 slidably receives the key, the key and groovecooperating to prevent turning of the sleeve on the column. In practicethe key 31 may extend throughout substantially. the entire length of theThe head l2 includes an upper section 39 which is bolted or otherwisesecured to the sleeve 36. The section 39 preferably projects rearwardlyfrom the sleeve 36 relative to the front of the trailer Ill. A tubulardrill stem 40 is provided for carrying the drill l3 and extends parallelwith the column ll to have its upper portion extend through openings 4|and 42 in the section 39. Packing 43 is arranged in the opening 42 andis compressed by a gland 44 to seal about the stem 46. A cap 45 isattached to the upper end of the head section 39 and has a. tubular part46 extending downwardly through the opening 4|. Packing 41 is arrangedin the tubular part 46 and a gland 48 is provided to maintain thepacking under compression to'seal about the drill stem 46.

The drill head or driving head l2 includes a housing section 49 attachedto the lower side of the section 39. The drill stem 40 passes downwardlythrough an opening 50 in the lower wall of the housing section 49 and apacking gland 51 is provided at the opening 50 for sealing about thedrill stem. Means is provided for transmitting downward pressures orfeed pressures from the head to the drill stem 40. A split sleeve orcollar 52 surrounds the stem 46 and cooperates with the walls of agroove 53 in the stem. An anti-friction bearing 54 is arranged betweenthe collar 52 and the lower face of the section 39 for transmittinglongitudinal pressure between the head and drill stem 40.

The head I2 includes a transmission or drive for transmitting rotationfrom 'the power unit l4 to the drill stem 40. A shaft 55 is arranged ina plane at right angles to the plane of the longitudinal axis of thestem 40 and enters the housing section 49 through an opening 56. Apacking gland 51 is provided in the opening 56 to seal The transmissionor drive includes a worm 58 keyed on the shaft 55 within the housingsection 49 meshing with a worm wheel 59 on the drill stem 40. Bearings60 are provided at the opposite ends of the worm'58 to mount the shaft55 in the housing section 49. In the preferred stru. ture illustratedthe worm wheel 59 is attached to a hub 6| which is keyed on the drillstem 40. The underside of the hub 6| has a socket 62 and a bearing 63 isarranged in the socket to surround a bushing 65- on the drill stem 46.The upper end of the hub 6i may bear on the collar 52. The shaft 55projects forwardly from the housing section 49to connect with the shaftof the power unit l4, as will be subsequently described. The housingsection 49 may contain lubricant or grease for lubricating the severalbearings and the worm gearing.

The drill I3 is connected with the lower end of the drill stem 40 toturn therewith. The invention contemplates the employment of drills ofvarious characters on the drill stem. The particular drill l3illustrated includes ahead disc 65 threaded on the lower portion of thestem 40 to bear upwardly against a flange 66. The body 61 of the drillI3 is tubular whereby the drill is adapted to receive a core or sampleof the work W- The active or lower end of the drill body 61 is providedwith cutting parts which may be in the nature of teeth 68. The lowerportion of the drill stem 40 is preferably guided to steady and guidethe drill I3. In the particular structure shown'in the drawings a guide69 is attached to the column II and is removably attached to one of theframe members I I. The guide 69 has an opening I0 slidably receiving thedrill stem 40 whereby the guide 69 centers and.

steadies the drill stem.

The inventio-nincludes means for guiding and stcadying the drill I3. Themeans for guiding the drill I3 includes ribs II on the upper side of theplate 3|. The ribs II are disposed radially with respect to thelongitudinal axis of the drill I3 and have longitudinal channels I2.Blocks I4 are arranged in the channels I2 and have tongues I5 slidablyfitting the grooves 13. The

blocks I4 are adjustable inwardly by screws 16 threaded through openingsin the outer portions of the 'ribs I I. Rollers 11 are journaled innotches in the inner ends of the blocks I4 and are adapted to cooperatewith the periphery of the drill I body 61. The blocks 14 are adapted tobe locked or held in the adjustedpositions by screws or bolts I8extending through longitudinal slots'I9 in the blocks. The means forguiding the drill just described may be easily adjusted to accommodatedrills of different diameters by loosening the screws 18 and adjustingthe blocks I4 to positions where their rollers 11 properly-contact thedrill. The screws "I6 may aid the screws I8 in looking or retaining theblocks I4 in the adsleeve 35 to carry the engine I4 and its fuel tank8|. The bracket has an annular part 82 surrounding the crank shaft ordrive shaft '83 of the engine I4. The sleeve 36 has a complementaryannular flange 84 opposing the annular part 82'. An internal rim 85 onthe part 82 extends into and cooperates with a groove 88 in the flange84. The engine shaft 83 projects through the openings in the annularpart 82 and flange 84 and connects with the shaft 55. The shaftconnection illustrated comprises a tongue 8! on the forward end of theshaft 55 fitting a slot 88 in the rear end of the engine shaft 83. Acoupling 7 collar 89 may surround the adjacent connected endportions ofthe shafts.

In accordance with the invention the part 82 is connected with theflange 84 so that the engine I4 may be swung to different positions withrespect to the column II to adapt the machine to drill into vertical andinclined walls, etc. with its The engine in its properhorizontalposition. flange 84 has an annular concentric slot 90 and theinner portion of the slot is enlarged or provided with grooves 9|. Bolts92 are arranged in the slot 90 with their heads received in the grooves9|. The bolts 92' project forwardly from the flange 84 to extend throughspaced openings 93 in the annular part 82. Nuts 94 threaded on the bolts92 clamp against the part 82 to normally rigidly connect the part withthe flange 84 and thus rigidly connect the engine I4 with the sleeve :6.When it is desired to turn the engine I4 to a position where it will beupright when the machine is taking a sample from a vertical or inclinedstructure, the nuts 94 are loosened whereupon the power unit may beturned to the proper position, the bolts 92 moving through the annularslot 90 during such turning. Following the adjustment of the power unitI4 to its desired position the nuts 94 are tightened to lock it inplace.

The means I5 for advancing or feeding the drill I3 into the work isoperable to move the assembly of the sleeve 38, the head I2, the powerunit I4 and the associated parts longitudinally on the column II andthusadvance or retract the drill I3. The feed means I5 includesa-longitudinally disposed rack 95 attached to the column II. The rack 95is preferably diametrically opposite the key 31 and may extendthroughout the major portion of the column II. A transverse shaft 96 isrotatable inopenings 91" in the head section 39 and carries a pinion 98which meshes with the rack 95. The opposite end portions of the shaft 96project from the head section 39 and are polygonal for receiving anoperating lever, an operating wheel or the like. In the drawings, I haveshown an operating lever 99 removably arranged on one end portion of thepinion shaft 98 whereby the drill I3 may be manually advanced andretracted.

The invention contemplates arranging a pulley I00 on one end portion ofthe pinion shaft 96 andsecuring a feed-weight IN to a line I02 whichoperates over the pulley I00 to automatically feed the drill I3 into thework W. As the assembly of the sleeve 36, the head I2, the. drill I3,the power unit I4 and the related parts is comparatively heavy it ispreferred to counterbalance or partially counterbalance its weight. Thecounterbalance means illustrated in the drawings includes a pulley I03mounted on a cap 13 on the upper end. of the column II. A line I04 iscon: nected to the sleeve 36 and is trained over the pulley I03 to passdownwardly into the upper end of the tubular column II. A weight I05 isattached to the lower end of the line I04 and is freely movable inthe'tubular column I I to couning mechanism.

The means I6 is provided to circulate water or other suitable liquid tothe drill I3 to cool the drill, carry the cuttings away from the drilland prevent sticking of the drill, and thus insure the cutting of asmooth core of uniform cross section. The circulation means I6 includesa container or tank I08 mounted in the forward portion of the trailerbody 2i above the compartment 26. The weight of the tank I06 and itscontents has its center of gravity spaced forwardly from the axle I8 sothat the tank and the water counterbalance the weight of the drillingmechanism which is spaced rearwardly from. the axle I8. The circulationmeans I6 further includes a pump I91 mounted on the head section 39 by abracket I08. The shaft I09 of the pump I01 passes through a gland III)on the housing section 49 and has its forward end connected with theshaft 55. In the case illustrated the pump shaft I09 has a tongue II Ion its forward end received in a slot I I2 in the rear end of the shaft55 whereby the pump shaft turns with the shaft 55. A flexible conduit orhose II3 carries the water from the lower end of the tank I06 to theintake I I4 of the pump I01. A high pressure'pipe or discharge pipe II5extends from the discharge IIB of the pump to the fitting or cap 45. Anipple or coupling II'I connects the pipe H6 with the cap 45 so that thepipe discharges downwardly into the opening H8 of the tubular drill stem40. A valve I I8 may be provided to control the discharge from the tankHi5. The pump I is operable to draw or receive the water from the tankI06 and pass it under pressure into the upper end of the drill stem 40.The water discharges from the lower end of the drill stem opening H8into the drill body 61 so that it cools the drill and flushes around thecutting teeth 68 to clear the annular cut of cuttings. A stop member orlink I I9 is pivoted to the bracket 28. The link H9 is adapted to beswung upwardly to a'position where its upper end engages under thesleeve 36. When in such a position the link H9 supports the sleeve 36and its associated parts against downward movement. When the link H9 issupporting the sleeve 36 and its associated parts the screw 30 may beloosened so that rotation of the pinion shaft 96 causes the cooperationof the pinion 98 with the rack 95 to move the column I I upwardly ordownwardly. In this manner the column I I may be lowered to the positionwhere the plate 3I engages the work and in a like manner may beretracted into the trailer when the machine is to be moved.

The trailer I 0 carrying the machine may be readily drawn or towed tothe place where it is desired to obtain the sample. When it is desiredto obtain a sample of the material of a road,.

street or the like the trailer I0 may be drawn or towed by a truck orautomobile to the point where the sample is to be taken. The lack screws23, the column II and the drill I3 are, of course, retracted into thetrailer so that they do not interfere with its free movement while it isbeing towed. After the trailer It has been located at the position wherethe sample is to be taken the screws 23 may be threaded downwardly sothat the heads 24 engage the surfaceof the road or work to steady thetrailer I0 and hold it in the desired substantially horizontal position.The link I I 9, which may support the head I 2 and associated partsagainst movement during movement of the trailer I0, holds the head I2against downward movement so that the pinion 98 may be rotated to feedthe column I I downwardly and bring the plate against the surface of thework. The link I I 9 is released from the sleeve 36 and the screw orscrews 30 are tightened to hold the column H in the operative position.The pinion shaft 96 is then turned to move the sleeve 36 and theconnected parts downwardly to bring the active end of the drill I3adjacent the surface of the road or in engagement with the road. The

blocks 14 may be adjusted to positions where their rollers 'I'I properlycontact the periphery of the drill body 61.

" The power unit or engine I4 may then be started and the valve Ililopened so that the drill I3 is rotated by the drive Jf the head I2 andthe circulation'fiuid or water is. discharged into the drill. Thecutting parts or teeth 38 the road or work W to-the desired extent theengine I4 may be out 01f or stopped. The hand lever 99 is then rotatedto raise the sleeve 36 and its associated parts and thus retract thedrill I3 from the bore or cut in the work W. The weight [05'counterbalances the drilling mechanism so that it is easily moved on thecolumn II. 'The cylindrical portion or core C within the cut, made bythe drill I3 may be broken free to provide or form a sample to be testedto determine the quality or character of the road or work. It isbelieved that it will be apparent how the machine carried by the trailerI0 may be easily moved from place to place as desired to obtain samplesin the manner just described.

The drilling mechanism may be removed from the trailer Ill for thepurpose of obtaining samples of vertical inclined or overhead work orstructures. To disconnect the drilling mechanism from the trailer IIIthe cap 28 is removed, whereupon the column II and the associated partsmay be removed from therear of thetrailer. The hose I I3 is disconnectedfrom the pump I01 before the removal of the mechanism from the trailer.Following the removal of the mechanism from the trailer I0 it may be setup in the desired position to take the sample.

Fig. 6 of the drawings illustrates the drilling mechanism operating toobtain a sample of a vertical partition or a wall X. When employed inthis manner the column II is preferably at right angles to the face ofthe wall and in the case illustrated is substantially horizontal. Inorder that the power unit or engine I4 be in its proper upright positionwhen the column II is horizontal the nuts 94 are loosened and the engineI4 is swung to the desired position and locked in place bytightening'thenuts 94. This shifting of the engine I4 is preferably done prior to orduring the movement of the column II to its horizontal position. In theparticular case shown in Fig. 5 of the drawings the engine I4 isdisposed at substantially right angles to the column II, it beingunderstood that it may be arranged at any other angles as conditions mayrequire. The plate 3| is arranged against the face of the wall X and issecured thereto by screws I50 cooperating with expansion bolts ISI setin previously formed openings in the wall X.

The screws I rigidly attach the plate 3! to the wall X and the bolt 33secures the column II to the plate. The blocks 14 may be adjusted tobring their rollers 11 in proper cooperation with the drill I3 asdescribed above. Where a supply of water is present and when conditionsrequire, a hoseor conduit I52 may be connected with the coupling H! tosupply water to the drill I3. The machine operates as described above tomake an annular cut or channel in the wall X so that a core or sample ofthe material of the wall X may be easily obtained. It is believed thatit will be apparent how the machine may be employed to obtain samplesfrom structures'in various positions. The drilling mechanism proper iseasily removed from the trailer I0 and is easily replaced thereon fortransportation from place to place.

Having described only a typical preferred form and application of myinvention I do not wish to be limited or restricted to the specificdetails herein set forth, but wish to reserve to myself any variationsor modifications that may appear to those skilled in the part, or mayfall within thescope of the following claims.

Having described my invention, I claim:

accuse 1. A sample taking machine oi. the character described includinga wheeled vehicle, a drilling mechanism comprising a drill, and meansfor operating the drill, means for detachably mountanism on the work foroperation when detached from the vehicle.

2. A sample taking machine of the character described including asupport member, a drill stem for carrying a sample taking drill, a drillhead carried by the member for transmitting rotation to the stem, awheeled vehicle, andmeans for detachably mounting the support member onthe vehicle where the drill is operative whereby the drill may beoperated with the support mem her on the vehicle and when the supportmember is removed'from the vehicle.

3. A sample taking machine of the character described including awheeled vehicle, a guide, a drill 'stem for carrying a drill, a headshiitable onthe guide for transmitting rotation to the stem, 9. powerunit associated with the head for rotating the stem and amembersupporting the guide and detachably mounted on the vehicle whereby thedrilling mechanism may be operated on the vehicle and when removed fromthe vehicle. I, 1

4. A sample taking machine of the character described including awheeled vehicle, a guide on the vehicle, a drill stem for carrying adrill, a head shiftable on the guide for transmitting rotation to thestem, a power unit associated with the head for'rotating the stem, andmeans on the vehicle for cooperating with the work and the drill tostabilize the'drill.

5. A sample taking machine of the character described including awheeled vehicle, a guide column, a drill stem, a head shiftable on thecolumn and carrying the drill stem, 9. power unit associated with thehead to move therewith, the head including means for transmittingrotation from the power unit tothe drill stem, means for feeding thehead along the column, a portable member carrying the column, and meansdetach ably securing the member to the vehicle whereby' the drillingmechanism may be employed when on the vehicle and when-detached from thevehicle.

6. A sample taking machine of the character described including awheeled vehicle, a guide column on the vehicle, a tubular stem iorcarrying a sample taking drill, a head shiftable on the column andcarrying the stem, means for rotating the stem, and means forcirculating liquid through the stem to flush the drill, 'a portablemember carrying the column, and means detachably securing the member tothe vehicle whereby the drilling mechanism may be employed when on thevehicle and'when detached from the vehicle.

7. In a portable sample taking machine, a guide column, means forattaching the column to the part to be sampled, a head shiftable alongthe guide, a drill stem carried by the head for rotation and adapted tooperate a drill, shiftable guide parts on said means. shiitable topositions to guide drills of difierent diameters, and a power unitassociated with the head and operable to rotate the drill stem.

8. In a sample taking machine, a guide col- .umn, means for attachingthe column to the part to be sampled, at head shiftable along thecolumn, a drill stem carried by the head for rotation, means foradvancing the head along the column to feed the drill stem toward thework, an engine for rotating the drill stem, and means adjustablyconnecting the engine with the head whereby the engine moves with thehead and may be adjusted to an upright position when the column is invarious positions.

9. In a machine for taking samples, a guide column, a head shiitablealong the column, a drill stem carried by the head for rotation, meansfor advancing the head along the column to feed "the drill stem towardthe work, a drill on the stem, an engine for rotating the stem, andmeans adjustably connecting the engine with the head whereby the enginemay be arranged in a substantially upright position when the column isin various positions.

10. In a machine for taking samples, a guid column, a head shiitablealong the column, a drill stem carried by the head for rotation, a drillon the stem, means for shifting the head along the columnto feed thedrill relative to the work, a power unit tor rotating the stem having ashaft, means adjustably connecting the power unit with the head wherebythe unit shifts along the column with the head and may be arranged in anupright position when the head is in various positions, and meansholding the unit in its adjusted position with respect to the head.

11. In a sample taking machine, a guide column, means for rigidlyattaching the column to the part to be sampled, a head shiitable alongthe guide column, a drill stem carried by the head for rotation, meanscarried by the head for rotating the stem, a drill on the stem, andmeans on the first mentioned means for guiding the drill including guidemembers on the first mentioned means shiftable to have guidingengagement with drills of various diameters.

i 12. A sample taking machine of the character mentioned including aguide column, a drill stem, a head shiftable along the column andcarrying the stem for rotation, means for rotating the stem, a drill onthe stem, a vehicle, means mounting the column on the vehicle so that itmay be projected from its under side, and a plate for supporting thelower end of the column on the ing the lower end or the column on thework to be sampled,-and means on the plate for guiding the drill.

14. A sample taking machine of the character mentioned including a guidecolumn, a drill stem, a head shiitable along the column and carrying thestern for rotation, means for rotating the stem, a drill on the stem, avehicle, means mounting the column on the vehicle so that it may beprojected from its under side, a plate for supporting the lower end ofthe column on the work to besampled, and means on the plate for guidingthe drill, including rollers for engaging the drill, and meansadjustably mounting the rollers on the block to guide drills of varioussizes.

15. A sample taking machine of the character mentioned including a guidecolumn, a drill stem, a head shiftable along the column and carrying thestem for rotation, means for rotating the stem, a drill on the stem, avehicle, means mounting the column on the vehicle so thatit may beprojected from its under side, the stem being substantially parallelwith the column whereby the drill may act downwardly against the work tobe sampled, and means for stabilizing the vehicle during operation ofthe device.

16. A drilling mechanism'of the character'described comprising, acolumn, means for rigidlysecuring the column to the work to be drilled,a H

rotary drilling head shii'table along the column, a drill rotated .bythe head, means for advancing the head on the column under a uniformpressure to feed the drill relative to the work, and means on the firstmentioned means ior guiding the drill.

i 17. A portable drilling mechanism of the character describedcomprising, a column,means for rigidly securing the column to the workto be drilled, a drilling head shiftable along the column, a drillrotated by the head, means for advancing the head on the column to feedthe drill relative to the work, and means on the first mentionedmeansjor guiding the drill including ace-gees column to the work, a headshiftable along the column, a rotatable drill stem carried by the head,means for shifting the head along the column to feed the drill stemrelative to the work, an engine for rotating the drill stem, and meansconnecting the engine with the head for movement therewith and forfullrotary adjustment with respect thereto whereby the engine may bemaintained in a substantially upright position when the head is in anyrotative position with respect to the axis of the engine.

' FRANK-L. HOWARD.

